I just got on to the OSMC Bandwagon and decided to Install on a SD card while I waited for my Pi - 2 to show up. Downloading the Windows Based Installer was easy and I can confirm that your Installer works on Windows 10 TP.
After selecting Pi 2 as my install flavour, it continued with a clean install and I was presented with a success notification.
Tinkering around the newly created Pi-2 capable SD Card, I found that OSMC had partitioned the Card into a 234 MB Partition and left the rest of the space unused.
I am just curious if this is by design and if yes, then why?